Spatially inhomogeneous impurity distribution in ZnO micropillars

被引：71

作者：

Nobis, T ^{[1
]}

Kaidashev, EM ^{[1
]}

Rahm, A ^{[1
]}

Lorenz, M ^{[1
]}

Lenzner, J ^{[1
]}

Grundmann, M ^{[1
]}

机构：

[1] Univ Leipzig, Fak Phys & Geowissensch, Inst Expt Phys 2, D-04103 Leipzig, Germany

来源：

NANO LETTERS | 2004年 / 4卷 / 05期

关键词：

D O I：

10.1021/nl049889y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Using ZnO a variety of micro- and nanostructures can be fabricated. We investigate hexagonal micropillars grown by high pressure pulsed laser deposition on sapphire with spatially and spectrally resolved cathodoluminescence. We demonstrate that the impurity and defect incorporation is strongly inhomogeneous, at least under the present growth conditions, dramatically influencing the optical properties.

引用

页码：797 / 800

页数：4

共 17 条

[1] Infrared dielectric functions and phonon modes of high-quality ZnO films [J].

Ashkenov, N ;

Mbenkum, BN ;

Bundesmann, C ;

Riede, V ;

Lorenz, M ;

Spemann, D ;

Kaidashev, EM ;

Kasic, A ;

Schubert, M ;

Grundmann, M ;

Wagner, G ;

Neumann, H ;

Darakchieva, V ;

Arwin, H ;

Monemar, B .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (01) :126-133

[2] SCANNING CATHODOLUMINESCENCE MICROSCOPY - A UNIQUE APPROACH TO ATOMIC-SCALE CHARACTERIZATION OF HETEROINTERFACES AND IMAGING OF SEMICONDUCTOR INHOMOGENEITIES [J].

CHRISTEN, J ;

GRUNDMANN, M ;

BIMBERG, D .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1991, 9 (04) :2358-2368

[3] High electron mobility of epitaxial ZnO thin films on c-plane sapphire grown by multistep pulsed-laser deposition [J].

Kaidashev, EM ;

Lorenz, M ;

von Wenckstern, H ;

Rahm, A ;

Semmelhack, HC ;

Han, KH ;

Benndorf, G ;

Bundesmann, C ;

Hochmuth, H ;

Grundmann, M .

APPLIED PHYSICS LETTERS, 2003, 82 (22) :3901-3903

[4] Ga-doped ZnO films grown on GaN templates by plasma-assisted molecular-beam epitaxy [J].

Ko, HJ ;

Chen, YF ;

Hong, SK ;

Wenisch, H ;

Yao, T ;

Look, DC .

APPLIED PHYSICS LETTERS, 2000, 77 (23) :3761-3763

[5] Materials science - Self-assembled nanocoils [J].

Korgel, BA .

SCIENCE, 2004, 303 (5662) :1308-1309

[6] Hierarchical ZnO nanostructures [J].

Lao, JY ;

Wen, JG ;

Ren, ZF .

NANO LETTERS, 2002, 2 (11) :1287-1291

[7] ZnO nanobridges and nanonails [J].

Lao, JY ;

Huang, JY ;

Wang, DZ ;

Ren, ZF .

NANO LETTERS, 2003, 3 (02) :235-238

[8] Green luminescent center in undoped zinc oxide films deposited on silicon substrates [J].

Lin, BX ;

Fu, ZX ;

Jia, YB .

APPLIED PHYSICS LETTERS, 2001, 79 (07) :943-945

[9] Cathodoluminescence of selected single ZnO nanowires on sapphire [J].

Lorenz, M ;

Lenzner, J ;

Kaidashev, EM ;

Hochmuth, H ;

Grundmann, M .

ANNALEN DER PHYSIK, 2004, 13 (1-2) :39-42

[10]

LORENZ M, UNPUB

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